A team use my domain name without permission

Hi all,

my team is here:
http://einstein.phys.uwm.edu/team_display.php?teamid=411

but there is another one without any points (or so few) that a banned member of my forum created without my permission.
As my domain name is in the team name, it's confusing some of..

So is there anyway to erase this team ?
http://einstein.phys.uwm.edu/team_display.php?teamid=6817

Thanks a lot